{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:05.365034", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2011-Aug-01_to_2011-Aug-07_345.5_26.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2011080000130}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "August 01 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 07 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 61293.72245169768}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Mauritania", "Morocco"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": ["North Atlantic Ocean"]}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 26.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 345.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "345.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 344.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 348.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.5, 26.75], [-13.97, 26.53], [-13.75, 26.0], [-13.97, 25.47], [-14.5, 25.25], [-15.03, 25.47], [-15.25, 26.0], [-15.03, 26.53], [-14.5, 26.75]]]]}, "2011-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.5, 27.25], [-13.97, 27.03], [-13.75, 26.5], [-13.85, 26.25], [-13.75, 26.0], [-13.97, 25.47], [-14.5, 25.25], [-14.75, 25.35], [-15.0, 25.25], [-15.53, 25.47], [-15.75, 26.0], [-15.53, 26.53], [-15.18, 26.68], [-15.03, 27.03], [-14.5, 27.25]]]]}, "2011-08-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.5, 27.25], [-13.97, 27.03], [-13.75, 26.5], [-13.85, 26.25], [-13.75, 26.0], [-13.97, 25.47], [-14.5, 25.25], [-14.75, 25.35], [-15.0, 25.25], [-15.53, 25.47], [-15.75, 26.0], [-15.53, 26.53], [-15.18, 26.68], [-15.03, 27.03], [-14.5, 27.25]]]]}, "2011-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.5, 27.25], [-13.97, 27.03], [-13.75, 26.5], [-13.85, 26.25], [-13.75, 26.0], [-13.97, 25.47], [-14.5, 25.25], [-14.75, 25.35], [-15.0, 25.25], [-15.53, 25.47], [-15.75, 26.0], [-15.53, 26.53], [-15.18, 26.68], [-15.03, 27.03], [-14.5, 27.25]]]]}, "2011-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.15, 25.75], [-15.25, 26.0], [-15.15, 26.25], [-15.25, 26.5], [-15.03, 27.03], [-14.5, 27.25], [-14.0, 27.04], [-13.68, 27.18], [-13.53, 27.53], [-13.0, 27.75], [-12.47, 27.53], [-12.25, 27.0], [-12.35, 26.75], [-12.32, 26.68], [-12.25, 26.65], [-12.0, 26.75], [-11.47, 26.53], [-11.25, 26.0], [-11.35, 25.75], [-11.25, 25.5], [-11.47, 24.97], [-12.0, 24.75], [-12.25, 24.85], [-12.32, 24.82], [-12.47, 24.47], [-12.82, 24.32], [-12.97, 23.97], [-13.5, 23.75], [-13.75, 23.85], [-14.0, 23.75], [-14.53, 23.97], [-14.68, 24.32], [-15.03, 24.47], [-15.25, 25.0], [-15.15, 25.25], [-15.25, 25.5], [-15.15, 25.75]]]]}, "2011-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.03, 26.03], [-14.5, 26.25], [-14.25, 26.15], [-14.18, 26.18], [-14.15, 26.25], [-14.25, 26.5], [-14.03, 27.03], [-13.68, 27.18], [-13.53, 27.53], [-13.0, 27.75], [-12.47, 27.53], [-12.25, 27.0], [-12.35, 26.75], [-12.32, 26.68], [-12.25, 26.65], [-12.0, 26.75], [-11.47, 26.53], [-11.25, 26.0], [-11.35, 25.75], [-11.25, 25.5], [-11.47, 24.97], [-12.0, 24.75], [-12.25, 24.85], [-12.32, 24.82], [-12.47, 24.47], [-12.82, 24.32], [-12.97, 23.97], [-13.5, 23.75], [-13.75, 23.85], [-14.0, 23.75], [-14.53, 23.97], [-14.68, 24.32], [-15.03, 24.47], [-15.25, 25.0], [-15.15, 25.25], [-15.25, 25.5], [-15.03, 26.03]]]]}, "2011-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.03, 26.03], [-14.5, 26.25], [-14.25, 26.15], [-14.18, 26.18], [-14.15, 26.25], [-14.25, 26.5], [-14.03, 27.03], [-13.68, 27.18], [-13.53, 27.53], [-13.0, 27.75], [-12.47, 27.53], [-12.25, 27.0], [-12.35, 26.75], [-12.32, 26.68], [-12.25, 26.65], [-12.0, 26.75], [-11.47, 26.53], [-11.25, 26.0], [-11.35, 25.75], [-11.25, 25.5], [-11.47, 24.97], [-12.0, 24.75], [-12.25, 24.85], [-12.32, 24.82], [-12.47, 24.47], [-12.82, 24.32], [-12.97, 23.97], [-13.5, 23.75], [-13.75, 23.85], [-14.0, 23.75], [-14.53, 23.97], [-14.68, 24.32], [-15.03, 24.47], [-15.25, 25.0], [-15.15, 25.25], [-15.25, 25.5], [-15.03, 26.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.163684094546284}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.3637667166606757}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.89895277527171, 20.44133260913128, 20.576215495986276, 20.551030562449455, 23.12708181535811, 23.19253920945613, 23.66145243474665]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.89895277527171, 19.983605158928867, 20.23006347018577, 20.22258040686654, 20.39485178930238, 21.96806527336838, 22.23834064637265]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2191809539816632, -1.1510114249434007, -1.0349848782440176, -1.1043828752441602, -3.490222002207531, -4.037739846898223, -3.7367297801518866]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.2191809539816632, -1.2521319171246432, -1.143970839704707, -1.3126914446639262, -5.343434915559271, -6.163684094546284, -5.440601202960806]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.0175867537272663, -1.423986355883022, -1.3474140558071255, -1.4729534802797026, -1.3288964393235834, -1.4291368050445261, -1.314386085913769]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.0175867537272663, -1.75082814783735, -1.517995520728857, -1.6336180345232396, -1.5656954353188368, -1.702382076619215, -1.5479889625763406]}}